How can I fix the length of a favourite video generator?

I have a few favourite video generators in FCP; specific colours, text setups, etc., but they are always 10 seconds long. I've tried making a new 'color solid' for example, setting the length of it then doing 'add to favorites', but it immediately reverts to 10 seconds long. It's mildly annoying having to reduce the length of these clips if I need to drag them to the timeline (the way the project I'm working on is set up, they're always at the very start or end of a clip, so an insert or fit to fill edit wouldn't work).

Is there any way I can force FCP to always make this clip a certain length (1 second would be perfect)?